3 Answers
3

Since the drive is formatted as NTFS, something different than normal needs to be done. As NTFS does not support Unix-style file permissions, you will need to protect your drive by mounting it read-only. Assuming it is already mounted, you can do:

The best way to do this is to simply change the ownership and permissions of all the files. Beware that this may take a while, depending on how much you have saved on your drives. You can leave it mounted read-write, but you would still need to use sudo for all operations to the files.

Assuming they are already mounted (at the locations stated above), you can just do:

The first command makes all the files within /mnt/media1 and /mnt/media2 readable to everybody and writable only to the owner or group. The next command changes the owning user and group to root so that you need to use sudo to modify anything on the drive. You will only have to run these commands once; after that, they are permanently stored on the drive.

This will sufficiently protect your drive from user tampering while maintaining the readability of its stored contents.